GENUS I. 



GOOSEFOOT FAMILY. 



io. Chenopodum murale L. Nettle-leaved 

 Goosefoot. Sow-bane. Fig. 1686. 



Chenopodium murale L. Sp. PI. 219. 1753. 



Annual, scarcely or not at all mealy, some- 

 what scurfy above, stem erect or decumbent, 

 usually branched, i-2j high, leafy to the sum- 

 mit. Leaves rhombic-ovate, thin, bright green 

 on both sides, acute or acuminate at the apex, 

 sharply and coarsely sinuate-dentate, broadly 

 cuneate or subtruncate at the base, slender- 

 petioled, 2'-4' long; flowers in loose axillary 

 panicles shorter than the leaves, often not longer 

 than the petioles ; calyx-segments not entirely 

 enclosing the utricle ; styles short ; seed sharp- 

 edged, horizontal, firmly attached to the pericarp; 

 embryo completely annular; stamens 5. 



In waste places, Maine to Michigan and British 

 Columbia, south to Florida and Mexico. Natural- 

 ized from Europe. Widely distributed as a weed in 

 civilized regions. June-Sept. 



11. Chenopodium hybridum L. Maple-leaved Goosefoot. Fig. 1687. 



Chenopodium hybridum L. Sp. PI. 219. 1753. 



Annual, bright green, not mealy, sometimes 

 more or less scurfy; stem slender, erect, usually 

 branched, 2-4J tall. Leaves ovate or rhombic- 

 ovate, long-acuminate at the apex, truncate 

 rounded or subcordate at the base, thin, slender- 

 petioled, sharply dentate with 1-4 large acute 

 teeth on each side, or the upper lanceolate and 

 entire, the lower 4'-?' long; flowers in large 

 axillary and terminal panicles; calyx about i" 

 broad, its segments oblong, rather obtuse, herba- 

 ceous, slightly keeled, incompletely covering the 

 fruit ; stamens 5 ; styles short ; seed horizontal, 

 sharp-edged, firmly attached to the pericarp; 

 embryo a complete ring. 



In woods and thickets, sometimes in waste places, 

 Quebec to British Columbia, south to southeastern 

 New York, Kentucky, Arkansas, Utah and New 

 Mexico. Also in Europe. Sow-bane, Swine's-bane. 

 July-Sept. 



12. Chenopodium rubrum L. Red Goosefoot.^ Pigweed. Fig. 1688. 



Chenopodium rubrum L. Sp. PI. 218. 1753. 



Blitian rubrum Reichb. Fl. Germ. Exc. 582. 1830-32. 



Annual, glabrous, somewhat fleshy, not mealy, 

 stem erect, leafy, i-2i tall, often much branched, 

 the branches strict or ascending. Leaves thick, 

 ii'-4' long, rhombic-ovate or rhombic-lanceolate, 

 petioled, acute acuminate or obtuse at the apex, 

 narrowed at the base, coarsely sinuate-dentate or 

 the upper entire; flowers in erect compound leafy- 

 bracted axillary and terminal spikes often exceed- 

 ing the leaves; calyx 3-5-parted, its segments 

 slightly fleshy, red, not keeled, obtuse, about as 

 long as the utricle; stamens I or 2; styles short; 

 seed horizontal, \" wide, shining, rather sharp- 

 edged, separating from the pericarp; embryo 

 annular. 



On the seacoast, Newfoundland to New Jersey, and 

 in saline soil in the interior across the continent, south 

 to central New York, Nebraska and British Columbia. 

 Also in Europe and Asia. Swine's-bane. July-Sept. 



Chenopodium humile Hook., of similar situations, is 

 lower, has flowers in axillary clusters and a smaller 

 seed, and may be specifically distinct. 



